Electric mixer



FIG. 1 is a top, front, and right side perspective view of an electric mixer showing my new design;

FIG. 2 is a right side elevational view, the side opposite being a mirror image;

FIG. 3 is a top plan view;

FIG. 4 is a front elevational view;

FIG. 5 is a rear elevational view; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an electric mixer, as shown and described. 